[PATCH] Templatize tooling::deduplicate()

[Sean Silva]

  What is this used for? What sorts of "extra data" would there be? What are the semantics for preserving the "extra data" when deduplicating replacements that are identical except that they have different "extra data"?

  It seems like this is better handled by keeping a map off to the side keyed on the Replacement.

http://llvm-reviews.chandlerc.com/D1415